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12 volt door switch alarm

Discussion in 'General Electronics Discussion' started by Dietmar, Feb 24, 2017.

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  1. Dietmar


    Jun 29, 2016
    Searching for a diagram for a 12 volt input door switch (magnet N/C) alarm. The output also a 12V sirene, about 5W.
    When the alarm is activated, it must automatically reset after 1 minute and arm itself again if the magnet is still in a N/C position.
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